9773800987 has 4 divisors (see below), whose sum is σ = 10198748880. Its totient is φ = 9348853096.

The previous prime is 9773800969. The next prime is 9773801029. The reversal of 9773800987 is 7890083779.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7890083779 = 5657 ⋅1394747.

It is a cyclic number.

It is not a de Polignac number, because 9773800987 - 2¹¹ = 9773798939 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9773803987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212473912 + ... + 212473957.

It is an arithmetic number, because the mean of its divisors is an integer number (2549687220).

Almost surely, 2^9773800987 is an apocalyptic number.

9773800987 is a deficient number, since it is larger than the sum of its proper divisors (424947893).

9773800987 is a wasteful number, since it uses less digits than its factorization.

9773800987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424947892.

The product of its (nonzero) digits is 5334336, while the sum is 58.

The square root of 9773800987 is about 98862.5358110948. The cubic root of 9773800987 is about 2138.0662785733.

The spelling of 9773800987 in words is "nine billion, seven hundred seventy-three million, eight hundred thousand, nine hundred eighty-seven".